alleryFor matrix A with |A| = 5 and A is 3×3, |2A| =
A5
B40 (= 2³ × 5)
C10
D20
Answer & Solution
Correct answer: B. 40 (= 2³ × 5)
|kA| = k^n |A| where n is size of matrix.
For 3×3 and k = 2: |2A| = 2³ × 5 = 40.
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